nstx-u t&t tsg contributions to fy15 jrt nstx-u supported by culham sci ctr york u chubu u fukui...
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NSTX-U T&T TSG Contributions to FY15 JRT
NSTX-U Supported by
Culham Sci CtrYork U
Chubu UFukui U
Hiroshima UHyogo UKyoto U
Kyushu UKyushu Tokai U
NIFSNiigata UU Tokyo
JAEAInst for Nucl Res, Kiev
Ioffe InstTRINITI
Chonbuk Natl UNFRI
KAISTPOSTECH
Seoul Natl UASIPP
CIEMATFOM Inst DIFFER
ENEA, FrascatiCEA, Cadarache
IPP, JülichIPP, Garching
ASCR, Czech Rep
Coll of Wm & MaryColumbia UCompXGeneral AtomicsFIUINLJohns Hopkins ULANLLLNLLodestarMITLehigh UNova PhotonicsOld DominionORNLPPPLPrinceton UPurdue USNLThink Tank, Inc.UC DavisUC IrvineUCLAUCSDU ColoradoU IllinoisU MarylandU RochesterU TennesseeU TulsaU WashingtonU WisconsinX Science LLC
Y. Ren, W. Guttenfelder, S.P. Gerhardt, S.M. Kayeand the NSTX-U Team
T&T TSG Experimental Ideas
• NSTX-U will have a set of experimental knobs to vary/control pressure and current profiles – Two NBIs (6 independent sources), HHFW, 3D coils and lithium
deposition• Different pressure and current profiles from using a subset of the 6 NBI
sources • Heating/current drive from HHFW with NBI or used independently • 3D coils used to modify rotation profile coupled with NBI• Different profiles with/without lithium
– Need to identify ways to decouple pressure and current profile variations• Different time scales of pressure and current profile relaxation• HHFW in heating mode
T&T TSG Experimental Ideas• T&T researches to support the FY15 JRT
– qmin dependence of confinement (fixed q95)• DIII-D observation of degraded confinement
with broader current profile and with q95 fixed
– BT, Ip and collisionality scalings with different NBI source combinations and HHFW • Try to decouple pressure and current profile• 3D coils to modify rotation profile
– Lithium scan to vary pressure and current profile • Need to assess the coupling between pressure
and current profile
– Lithiated and non-lithiated plasma comparison• Confinement and pressure profiles are known
to be different between the cases from NSTX experiments
– Also impurity and momentum confinement
Kaye (2007,2013)
Gerhardt(2011)